I like this sentiment, but giving the US intelligence apparatus what amounts to a veto for elected/appointed officials feels like a recipe for disaster.
The only way I see that being workable is if the clearance grantors are transparently beholden to elected officials or the people directly. Which are essentially what elections and the congressional confirmation process are supposed to be. But both of those processes feel like they've been subverted. (Elections by the two-party system and the fact that half the population seems intent on electing a dictator, and the other by the senators/representatives that come out of that electoral system).
Thousands of military drones have been remotely piloted for decades. This news isn't as ground breaking as it might seem. Some of these drones are large: https://en.m.wikipedia.org/wiki/Northrop_Grumman_RQ-4_Global_Hawk
I know a military drone isn't the same as a passenger carrying airplane, but for cargo I think the only reason this isn't already a thing is because drones are military tech and most governments don't want that falling into the wrong hands.